/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.gluten.extension.columnar.validator

import org.apache.spark.sql.execution.SparkPlan

trait Validator {
  import Validator._
  def validate(plan: SparkPlan): OutCome

  final def pass(): OutCome = {
    Passed
  }

  final def fail(p: SparkPlan): OutCome = {
    Validator.Failed(s"[${getClass.getSimpleName}] Validation failed on node ${p.nodeName}")
  }

  final def fail(reason: String): OutCome = {
    Validator.Failed(reason)
  }
}

object Validator {
  sealed trait OutCome
  case object Passed extends OutCome
  case class Failed private (reason: String) extends OutCome
}
